COMP: Bumped up minimum required CMake version

- Minimum version for any system is 2.8.4

- Minimum version for Windows is 2.8.8

- Minimum version for systems without /dev/urandom is 2.8.5

Change-Id: Ide6335732ef1218b953b5eb8ad59e40765b681f0
Merge topic 'CMakeMinimumVersion'

e539b94 COMP: Bumped up minimum required CMake version